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Since the end of the 1930s, J·F·Hide of Corning Glass in the United States successfully synthesized the world’s first organosilicon compound. After 70 years of development, organosilicon has been widely used due to its excellent properties. In aerospace, construction, electronic and electrical, mechanical engineering, transportation, Plastic processing, health care products, medicine, textiles and paper coating industries, it has emerged in the field of new chemical materials.

 The world's first silicone cosmetics brand "Silicare" was born in Revelen in the United States in the early 1950s. For half a century, under the research and development of an internationally renowned silicone company led by Dow Corning in the United States, silicone has been successfully applied to creams, creams, honey, perfumes, shampoos, powders, waxes, and creams. , Hair conditioner, lipstick, shaving cream, deodorant sweat agent, hair spray, bath detergent, mascara, eyeshadow, nail polish and sunscreen, there are hundreds of categories. It can be said that with the improvement of people's living standards and people's higher and higher requirements for cosmetics, silicone has become indispensable in the field of cosmetics production.

1. Organic silicon structural characteristics

Silicone is a polymer compound with a semi-inorganic and semi-organic structure, which exhibits a spiral structure in space. This determines that it has many excellent properties: lubricity, hydrophobicity, physiological inertness, resistance to ultraviolet radiation and compatibility, etc., which provides the possibility to improve the performance of cosmetics.

Silicone materials entered the field of cosmetics and have undergone rigorous toxicological research. It has been confirmed that this type of material has no toxicity in oral test, skin irritation test, no allergies, eye irritation test, no damage, no abnormality in inhalation toxicity test, no poisoning in gastric absorption and metabolism, no adverse effects in genetic test, no adverse effects in environmental impact test Bioconcentration phenomenon.

2. Current status of silicones for cosmetics

So far, the silicone products that have been successfully developed and can be used in cosmetics include: dimethyl polysiloxane, methyl phenyl polysiloxane, hydrogen-containing silicone oil, cyclic polysiloxane, methyl polysiloxane emulsion, Polyether modified silicone oil, alkyl modified silicone oil, amino modified silicone oil, silicone wax, silicone resin and silicone-treated powder, etc. series brands.

Now mainly introduce the application of silicone oil, organopolysilane, organosilicon surfactant and powder treatment agent in cosmetics.

3. Application of silicone products

3.1 Application of silicone oil in cosmetics

3.1.1 General properties of silicone oil

Silicone oil is a colorless, odorless and transparent liquid. It is one of the most toxic products in cosmetics. It is non-irritating, non-allergenic, non-stinging, and neutral to human skin. It is an excellent material for the manufacture of modern cosmetics. There is a large distance between silicone oil molecules, the molecular force is much weaker than that of hydrocarbons, the surface tension is low, and the surface activity is high. Therefore, silicone oil has excellent defoaming and anti-foaming properties and good film-forming properties. It is easy to form a very thin film, which is used in cosmetics and applied to the human body skin, just like a very thin gauze mask, and achieves protection Skin function.

 Silicone oil is hydrophobic and insoluble in water. Silicone oil has excellent isolation and lubricity from other substances, and has the performance of blocking moisture without affecting air permeability. It has a high degree of gloss and makes the skin brighter. Silicone oil has excellent compatibility with other cosmetic raw materials.